At the moment I'm playing with absolute log analyser - you can download a free trial copy from ;
http://www.absolutelog.com/
it reads TCH log files without any difficulty at all, and seems to give me most of the information I'm after. On the summary though, it tells you which pages have been hit when by google (and other search engines), what search words were used, which are the most common etc. and it will turn the IP addresses into domain names for you.
On the negative side, it doesn't tell you which IP address google hit you - it just says google.
I just opened the log in a text editor and searched for "googlebot", the IP address is at the beginning of that line. All mine were 64.68.xx.xx - which doesn't fit with 61.* but it's closer that 21x.* so I guess it's a fresh bot
Andy